A comparison - hopefully this helps some folks: both the OG Nintendo Switch and Oled Switch are at max brightness. Obvious colour temp differences. Tried my best to photograph from directly above :
NINTENDO GAME & Watch The Legend of Zelda Handheld Console (retro And) Like New $50.00 - PicClick AU
Amazon.com: Nintendo Game & Watch: Super Mario Bros - 2.36" Full-Color LCD Screen - Family Christmas Holiday for Game Watch Super Mario 35th Anniversary - iPuzzle 9-in-1 Carrying Case for Nintendo Switch
Nintendo GAME & WATCH SUPER MARIO BROS RETRO India | Ubuy
NINTENDO GAME & WATCH SUPER MARIO BROS COLOR SCREEN SM-35 NEW IN BOX | eBay
Nintendo GAME & WATCH: SUPER MARIO BROS. Limited Edition Color Screen | eBay
Game & Watch The Legend Of Zelda NINTENDO Euro NEW/SEALED Colour Screen
File:Game & Watch Super Mario Bros - Color Screen (5).png - Wikipedia
Nintendo - Game & Watch Colour Screen - Video game console (2) - In original box - Catawiki
Acrylic Display Stand for Nintendo Game & Watch Colour Screen: Zelda - Etsy
Nintendo Gameboy Color Clear Q5 OSD XL IPS Display Colour Amp/speaker - Etsy Canada
Game Gear Micro / Nintendo Game & Watch Color Screen | Ashens : r/Ashens
Amazon.com: Nintendo Game & Watch: Super Mario Bros - 2.36" Full-Color LCD Screen - Family Christmas Holiday for Game Watch Super Mario 35th Anniversary - iPuzzle 9-in-1 Carrying Case for Nintendo Switch Lite : Video Games
Amazon.com: Nintendo Game & Watch: Super Mario Bros - 2.36" Full-Color LCD Screen - Family Christmas Holiday for Game Watch Super Mario 35th Anniversary - iPuzzle 9-in-1 Carrying Case for Nintendo Switch
beforemario: Nintendo Color Screen (Game and Watch Table Top) - Leaflet
NINTENDO - Game & Watch Zelda no Densetsu (The Legend of Zelda) Color Screen
Nintendo Game & Watch Super Mario Bros. Color Screen New
NINTENDO GAME & Watch Super Mario Bros 35th Limited Edition NEW CHRISTMAS GIFT £49.99 - PicClick UK
Amazon.com: Nintendo Game & Watch: Super Mario Bros - 2.36" Full-Color LCD Screen - Family Christmas Holiday for Game Watch Super Mario 35th Anniversary - iPuzzle 9-in-1 Carrying Case for Nintendo Switch
Game & Watch Color Screen: Super Mario Bros. (2020) - MobyGames
